The 2012 Idol Star Athletics – Swimming Championships was held at Jamsil Arena in Seoul, South Korea on January 8, 2012 and was broadcast on MBC on January 24, 2012 (2 episodes). At the championships a total number of 10 events in athletics and 2 events in swimming were contested: 6 by men and 6 by women. There were a total number of 150 participating K-pop singers and celebrities, divided into 16 teams.
| 50 m | Team E Baro (B1A4) | Team K Dongjun | Team C Hoya (Infinite) |
| 50 m Hurdles | Team K Dongjun | Team C Woohyun (Infinite) | Team F Donghyun (Boyfriend) |
| 4 X 50 m (Racewalking relay) | Team A Yoseob (Beast) Dongwoon (Beast) Doojoon (Beast) Junhyung (Beast) | Team B & Team G Sangchu (Mighty Mouth) Kim Kyung-jin Kim Jong-min (Koyote) Shorry J (Mighty Mouth) | Team M G.O (MBLAQ) Thunder (MBLAQ) Mir (MBLAQ) Lee Joon (MBLAQ) |
| 4 X 100 m | Team C L (Infinite) Dongwoo (Infinite) Woohyun (Infinite) Hoya (Infinite) | Team K Lee Hoo Hyungsik (ZE:A) Heechul (ZE:A) Dongjun (ZE:A) | Team D Dongho (U-KISS) AJ (U-KISS) Kiseop (U-KISS) Hoon (U-KISS) |
| High jump | Team H Niel (Teen Top) | Team H Ricky (Teen Top) | |
| Team E Sandeul (B1A4) |
| 50 m freestyle | Team B Shorry J (Mighty Mouth) | Team Y Daniel (Dalmatian) | Team Z Marco |
| 100 m | Team J Gaeun (Dal Shabet) | Team K Eunji (Nine Muses) | Team F Bora (Sistar) | |
| 50 m Hurdles | Team L Bomi (Apink) | Team F Bora (Sistar) | Team J Gaeun (Dal Shabet) | |
| 4 X 50 m (Racewalking relay) | Team F Bora (Sistar) Hyolyn (Sistar) Dasom (Sistar) Soyou (Sistar) | Team M Kang Min-kyung (Davichi) Qri (T-ara) Lee Hae-ri (Davichi) Hyomin (T-ara) | Team A G.NA Jihyun (4Minute) Jiyoon (4Minute) Sohyun (4Minute) | |
| 4 X 100 m | Team F Hyolyn (Sistar) Dasom (Sistar) Soyou (Sistar) Bora (Sistar) | Team K Eunji (Nine Muses) Yewon (Jewelry) Kyungri (Nine Muses) Lee Sem (Nine Muses) | Team C Jooyeon (After School) Kahi (After School) Lizzy (After School) Uee (After School) | |
| High jump | Team C Kahi (After School) | Team L NS Yoonji | Team I Minah (Girl's Day) |
| 50 m freestyle | Team E Woori (Rainbow) | Team I T-ae (Rania) | Team K Minha (Nine Muses) |
| Episode # | Original broadcast date | TNmS Ratings[1] | AGB Nielsen Ratings[2] | ||||
|---|---|---|---|---|---|---|---|
| width=100 | Nationwide ! | width=100 | Seoul National Capital Area ! | width=100 | Nationwide ! | width=100 | Seoul National Capital Area |
| 1 | January 24, 2012 | 9.8% | 13.3% | 10.1% | 12.0% | ||
| 2 | 11.3% | 14.2% | 12.4% | 14.6% | |||